LU-928 misc: fix typos in comments

LU-928 misc: fix typos in comments

Fix typo obejct -> object.

Test-Parameters: trivial
Signed-off-by: Sohei Koyama <skoyama@ddn.com>
Change-Id: I4ab626ca188166e439191450b48e394243116bef
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54862
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>